.arrow_right{
    display: inline-block;
    width: 20px;
    height: 20px;
    background: url(../images/arrow_right.png) no-repeat;
    background-position: 50% 85%;
}
.arrow_down{
    display: inline-block;
    width: 20px;
    height: 20px;
    background: url(../images/arrow_down.png) no-repeat;
    background-position: 50% 85%;
}